WATCH: Alexander Vindman refuses to give information that could identify Trump whistleblower

Trump's first impeachment - 2020 Lt. Col. Alexander Vindman, an Army officer who works for the National Security Council, refused to provide details when asked from Rep. Devin Nunes, the ranking member of the House Intelligence Committee, about who Vindman spoke to about the July 25 call between President Donald Trump and Ukraine’s president. During an impeachment hearing where Vindman was testifying, Rep. Adam Schiff, the chair of the House Intelligence Committee, advised Vindman that he was not required to answer a question that he believed could identify the whistleblower, whose complaint sparked the impeachment inquiry into Trump. Vindman said he spoke to a member of the intelligence committee who had proper security clearance and had a “need to know” about the call. For more on who’s who in the Trump impeachment inquiry, read: https://www.pbs.org/newshour/politics... Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: Facebook: http://www.pbs.org/newshour Twitter:   / newshour   Instagram:   / newshour   Snapchat: @pbsnews Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe